/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Shippori+Mincho:wght@400;500;700&display=swap');

:root {
  /* Colors - Adjusted for the Monotone Logo */
  --bg-color: #000000; /* 黒に統一 */
  --text-main: #e0e0e8;
  --text-muted: #888899;
  --accent-purple: #8a6fb0; /* 少し深みと落ち着きのある紫へ */
  --accent-glow: rgba(138, 111, 176, 0.3);
  --border-color: #1a1a20;
  --card-bg: rgba(10, 10, 12, 0.9);

  /* Typography */
  --font-serif: 'Shippori Mincho', 'Playfair Display', serif;
  --font-sans: 'Helvetica Neue', Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-serif);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: radial-gradient(circle at 50% 0%, #111018 0%, var(--bg-color) 80%);
}

/* Typography elements */
h1, h2, h3 {
  font-weight: 700;
  letter-spacing: 0.05em;
}

a {
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--accent-purple);
  text-shadow: 0 0 8px var(--accent-glow);
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 5%; /* 高さを少し抑える */
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: var(--bg-color); /* ヘッダー背景をロゴに合わせて漆黒に */
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 60px; /* ロゴの高さ調整 */
  width: auto;
  filter: drop-shadow(0 0 5px var(--accent-glow));
  transition: transform 0.3s ease;
}

.logo:hover img {
  transform: scale(1.05);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav ul li a {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-purple);
  transition: width 0.3s ease;
  box-shadow: 0 0 5px var(--accent-glow);
}

nav ul li a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  z-index: -1;
  filter: grayscale(80%) sepia(20%) hue-rotate(220deg);
  animation: zoomBg 20s infinite alternate linear;
}

@keyframes zoomBg {
  0% { transform: scale(1); }
  100% { transform: scale(1.1); }
}

.hero-content {
  max-width: 800px;
  padding: 0 20px;
  z-index: 1;
}

.hero-title {
  font-size: 4.5rem;
  margin-bottom: 1rem;
  letter-spacing: 0.2em;
  text-shadow: 2px 2px 10px rgba(0,0,0,0.8);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s forwards 0.5s;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--accent-purple);
  letter-spacing: 0.3em;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s forwards 0.8s;
  text-shadow: 0 0 10px var(--accent-glow);
}

.hero-btn {
  display: inline-block;
  padding: 12px 36px;
  border: 1px solid var(--accent-purple);
  color: var(--accent-purple);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.9rem;
  background: transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  opacity: 0;
  animation: fadeUp 1s forwards 1.1s;
}

.hero-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(200, 162, 200, 0.1);
  transition: all 0.4s ease;
  z-index: -1;
}

.hero-btn:hover::before {
  left: 0;
}

.hero-btn:hover {
  box-shadow: 0 0 15px var(--accent-glow);
  color: #fff;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Singer Grids */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2.5rem;
  margin-bottom: 4rem;
}

.supporting-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  opacity: 0.9;
}

.card.featured {
  border-width: 1.5px;
  background: rgba(138, 111, 176, 0.03);
}

.card.featured img {
  height: 280px; /* 前回の350pxから縮小 */
}

.card.supporting {
  padding: 1.2rem;
}

.card.supporting img {
  height: 150px; /* サブはよりコンパクトに */
  margin-bottom: 1rem;
}

.card.supporting h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card.supporting p {
  font-size: 0.75rem; /* 0.8remからさらに縮小 */
  margin-bottom: 0.5rem;
}

/* セクション間の余白 */
section {
  padding: 100px 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.8rem;
  text-align: center;
  margin-bottom: 4rem;
  color: var(--text-main);
  position: relative;
  font-family: 'Playfair Display', serif;
}

.section-title::after {
  content: '✥';
  display: block;
  font-size: 1.5rem;
  color: var(--accent-purple);
  margin-top: 10px;
  text-shadow: 0 0 8px var(--accent-glow);
}

/* Content Grid / Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 4px;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 15px var(--accent-glow);
  transform: translateY(-5px);
}

.card h3 {
  color: var(--accent-purple);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.card p {
  font-size: 0.85rem; /* 0.95remから縮小 */
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.card .tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 10px;
  border: 1px solid var(--accent-purple);
  color: var(--accent-purple);
  margin-right: 5px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  margin-bottom: 1.5rem;
  filter: grayscale(40%) sepia(20%) hue-rotate(220deg);
  border: 1px solid var(--border-color);
}

/* Intro Text */
.intro-text {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.intro-text p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

/* Footer */
footer {
  text-align: center;
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
  background: rgba(0,0,0,0.3);
  margin-top: 8rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Utlities */
.fade-in-section {
  opacity: 0;
  transform: translateY(20vh);
  visibility: hidden;
  transition: opacity 1s ease-out, transform 1.2s ease-out;
  will-change: opacity, visibility;
}
.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
  visibility: visible;
}

/* Mobile Responsiveness / モバイル用の調整 */
@media (max-width: 768px) {
  header {
    padding: 0.8rem 5%;
    flex-direction: column;
    gap: 1rem;
    position: relative; /* Fixed from relative for mobile header? No, usually keep fixed or set to absolute if simple. Fixed is okay but adds height. */
  }

  .logo img {
    height: 50px;
  }

  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  nav ul li a {
    font-size: 0.75rem;
  }

  .hero-title {
    font-size: 2.8rem;
    letter-spacing: 0.1em;
  }

  .hero-subtitle {
    font-size: 0.9rem;
    letter-spacing: 0.2em;
  }

  section {
    padding: 60px 5%;
  }

  .section-title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }

  .featured-grid {
    grid-template-columns: 1fr;
  }

  .card.featured img {
    height: 220px;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .intro-text p {
    font-size: 0.875rem;
  }

  footer {
    margin-top: 4rem;
    padding: 3rem 1rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.2rem;
  }

  header {
    padding: 0.5rem 5%;
  }

  nav ul {
    gap: 0.8rem;
  }

  .contact-container {
    padding: 1.5rem;
  }

  .hero-btn {
    padding: 10px 24px;
    font-size: 0.8rem;
  }
}